LRailplan是一款专业的铁路平纵横设计一体化软件，覆盖新建和改建铁路全项目类型。全过程项目化管理，单元法定线，支持既有线平纵拟合重构、自定义横断面设计、点云建模等。适用于铁路、地铁等项目的线路设计。工欲善其，必先利其器！

Extract, organize, and insert object properties from your selection in Autodesk® AutoCAD® directly to the selected cell in your active Excel sheet.

This app is a powerful tool developed using VB.NET that allows you to count the number of each object and export the values to an Excel file.

Calculates the Total Length and Total Area of multiple objects of selected type(s) and exports the values to an Excel file.

A simple 2D maze generation app. Can also be used to generate random hatch patterns.

Leading Civil Engineering and Surveying Solution

Create slope pattern between selected edges.

Set of commands for Autodesk® AutoCAD® to resize the viewport, create a new one from model space, update its view, and generate its boundary.

Extends the picked end of an object (or last segment) to the picked destination point in a direction parallel to the object.

Arrange is an Autodesk® AutoCAD® plug-in for arranging objects.

MeteorCalc 3D is a block constructor that allows you to create 3D visualization blocks for street lighting installations. MeteorCalc 3D is a free part of software for street lighting - MeteorCalc SL

Bring Google Maps into Autodesk® AutoCAD® & Civil 3D® for FREE. Instantly georeference your drawing, access key Google Earth tools, & explore your site with real-world clarity. No GIS skills needed.

Calculates the Total Length/Area of multiple objects of selected type(s). Inserts labels and specifications of the selected objects.

A highly intuitive tool to help CAD users markup, comment on, and share project information with others. You can create slides, record narrations, export your markups to PDF, and more.

Set of commands for Autodesk® AutoCAD® to resize the viewport, create a new one from model space, update its view, and generate its boundary.

Aligns the view to the selected object, or the selected two points on screen, or to the selected line or polyline segment.

This application filters and selects objects with the same shape in the drawing.

Aligns selected objects to the left/right / top/bottom, or the center.

True Quickrotate / Quickmirror function. Rotates/mirrors selected objects about the center of selection in one step.

Allows changing the layer color of selected multiple objects without entering the layer manager.

This app can be used with Autodesk® AutoCAD® to create Spirograph (TM) like patterns. Turn AutoCAD into an educational toy that will provide hours of fun for the whole family!

Sums lengths/areas and copies them to the clipboard.

Selects all objects of the same layer / block name / object type / color as the selected object(s).

Inserts text from the clipboard to the selected TEXT, MTEXT, MULTILEADER, ATTRIBUTE, or ATTRIBUTEDEFINITION TAG.